Meng Yan takes its name from the Chinese words for nightmare, and the clip is shared online simply under that title with no clear original source attached. Its appeal comes from its brevity, lasting under a second while still carrying a dark, ominous weight that editors can drop into almost any tense moment. It circulates on soundboards as a quick horror accent for edits, gaming videos and reaction memes, where a full soundtrack would be too much and a single unsettling hit communicates dread immediately.